Car-brake



(No Model.)

. W. H. CARTER.

CAR BRAKE.

UNITED STATES arent trice.

CAR-BRAKE.

y SPECIFICATION forming part of Letters Patent No. 590,87 9, dated September 28, 1897.

- Application filed March 17, 1897. I Serial No. 627,915. (No model.)

citizen of the United States, anda resident p of Chicago, in the State of Illinois, have invented certain new and usefullmprovements in Car-Brakes, of which the following is a specication.

My invention relates to a friction device through means of which the momentum of the car may be utilized for applying or assisting in applying the brake-shoesV to the car- Wheels.

My invention consists in certain vcombinations and features of constructionwhereby the above objects are accomplished, to certain novel details whereby the disk is locked with the axle when the brakes are to be applied, to certain novel features of construe# tion in the disk, and to certain novel features in the construction of the shoes and the manner of mounting them. These features will be hereinafter fully described, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a plan view of the brake system. Fig. 2isa plan of one of the friction devices. Fig. 3 is aside elevation of one of the same. Fig. 4 is a detail detached perspective view of the disk, and Fig. 5 is a detail sectional View of the manner of mounting the friction-shoes.

My improved brake applying apparatus operates in either direction, and it is intended that there shall be mounted on each axle of the motor-car brakes which have connection with the ordinary brakes for 'controlling them.

1 represents any suitable form of wheelbrakes, 2 the brake connections, and 3 the friction devices about which theconnections 2 wind, so that tension is applied to said connections when the brake is applied.

As Will be seen from Figs.f1, 2, and 3, each friction device 'consists of a disk 4, divided diametrically and secured together about the axle by means of lugs 5 on one half, which enter sockets 6 on the other half, and pins 7, which pass through perforations 8 in the sides of the sockets and through perforations 9 in the lugs 5. (See Fig. 4.) vinterposed between the disk and the axle is a notched collar, which is keyed or otherwise secured to the axle at 12 for securely fixing the disk 0n the axle, or, if preferred, the collar may be `dispensed with and the disk secured directly i to the axle. f

16 are shoes having the flanges 16a for confining the controlling connection on them, which bear upon the periphery of the disk 4, and perforated to receive thevinwardly extending radial bolts 17, which are fixed at 18 in collars or spiders 1.9 on opposite sides of 4the disk and loosely upon thejhubs 2O of said disks. Springs 21 are mountedon said bolts 17between the collars 19 andthe frictionshoes 16 in order to throw said shoes normally away from the disk.

The cable 2 or other equivalent brake connection is fixed to a sheave 22 and passes once around the shoes 16 and thence to the brakesta 28. When tension is applied to the cable 2 by winding staff23, the shoes 16 are pressed about the disk 4, so as to press Ithe shoes to the disk. At the same time, said disk being locked against rotation on the axle, the friction-shoes are caused to rotate with the disk. This causes a Winding of the cable land a strong application ofthe brakes by a slight application of work at the brake-staff, and it will be seen, owing vto the disk being fixed on the axle, that the car will be braked against movement in either direction, thus making it easy to stop on grades without any fear of the car going backward.

25 are the connections, which pass from the respective wheel-brakes lover the sheaves 22, and thence to the trail-car connections. By this means an equalized braking effect is obtained on both the motor and trail cars.

The friction-shoes are corrugated or roughened to prevent slipping and to insure the winding effect on the cable.

y lIf it should be necessary to apply the brakes against a retrograde movement, as when stopping on a grade, the ordinary braking pressure produced by the brake-staff is ample for this, and the apparatus is entirely free to apply the brakes in this way Without material opposition from the friction devices.

A further advantage of my system is that the work performed by the friction devices also exerts a retarding influence on the car. If the motor-car is to be operated alone, the connections 25 are simplylooped together and the connections between the brake-beams and the sheaves 22 thus become fixed.

IOO

Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

l. A friction-clutch for car-brakes comprising the disk having hubs, the collars, the segmental shoes adapted to bear on the periphery of the disk, the radial bolts secured to the collars and extending through the shoes and the springs surrounding the bolts between the collars and the shoes; substantially as and for the purpose set forth.

2. A lfrictional device for application to the axle of a car, a combination of a disk 4 having a notched collar l0 for fixing the disk on said axle, collars or spiders loose upon the hub of the disk, shoes carried by said collars or spiders bearing upon said disk, and means for forcing the shoes against the disk at will, substantially as herein described.

3. In a friction device for car-brakes the combination of the axle, the disk iixed on the axle, shoes constructed to bear upon the pei l l l riphery of said disk, the collar or spider for holding said shoes, mounted loosely upon the hub of the disk and having arms to which the respective shoes are connected, and a Winding cable orV equivalent iexible connection passing around the shoes and adapted to press them into engagement with the disk and to hold them against rotation substantially as set forth.

4. In a friction device for car-brakes, the combination of the disk iiXed on the axle, the peripheral shoes bearin g upon said disk, the supporting-spider constructed to be loosely mounted upon the hub of the disk, and hav` ing arms to which the shoes are connected, and springs interposed between the spider and the shoes, to hold them normally away from the disk, substantially as set forth.

WILLTAM ll: CARTER.

\Vitiiesses:

CHARLES T. N. WHITE SPUNNER, WILLIAM I-I. DoBBINs. 

